//
//  AppDelegate.m
//  LoveBeen
//
//  Created by Alex on 16/12/22.
//  Copyright © 2016年 Alex. All rights reserved.
//

#import "AppDelegate.h"
#import "MainTabBarController.h"
#import "LBGuideController.h"


@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // 创建主控制器
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    
    self.window.rootViewController = [self pickRootViewController];
    
    [self.window makeKeyAndVisible];
    
    return YES;
}

- (UIViewController*)pickRootViewController
{
    // 刚开始运行的时候
    // 如果没有这个appVersion 那么就说明是第一次运行
    // 如果有但是这个版本号和当前不一致 那么说明是更新的
    
    // 获取ud对象
    NSUserDefaults* ud = [NSUserDefaults standardUserDefaults];
    
    // 获取当前的手机应用的版本号
    NSDictionary* dict = [NSBundle mainBundle].infoDictionary;
    NSString* appVersion = dict[@"CFBundleShortVersionString"];
    // 获取上一次手机的版本号
    NSString* lastVersion = [ud objectForKey:@"appVersion"];
    
    UIViewController* vc;
    
    if (![lastVersion isEqualToString:appVersion]) { // 需要改
        // 那么就说明是第一次运行 是更新的
        
        // 显示新特性控制器
        
        // 创建新特性的控制器
        LBGuideController* guide = [[LBGuideController alloc] init];
        vc = guide;
    }
    else {
        
        // 显示tabbar
        // 创建tabbarvc
        MainTabBarController* tabbarVC = [[MainTabBarController alloc] init];
        vc = tabbarVC;
    }
    // 获取info.plist
    [ud setObject:appVersion forKey:@"appVersion"];
    [ud synchronize];
    
    return vc;
}



- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}


- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}


- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}


- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}


- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    // Saves changes in the application's managed object context before the application terminates.
    [self saveContext];
}


#pragma mark - Core Data stack

@synthesize persistentContainer = _persistentContainer;

- (NSPersistentContainer *)persistentContainer {
    // The persistent container for the application. This implementation creates and returns a container, having loaded the store for the application to it.
    @synchronized (self) {
        if (_persistentContainer == nil) {
            _persistentContainer = [[NSPersistentContainer alloc] initWithName:@"LoveBeen"];
            [_persistentContainer loadPersistentStoresWithCompletionHandler:^(NSPersistentStoreDescription *storeDescription, NSError *error) {
                if (error != nil) {
                    // Replace this implementation with code to handle the error appropriately.
                    // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
                    
                    /*
                     Typical reasons for an error here include:
                     * The parent directory does not exist, cannot be created, or disallows writing.
                     * The persistent store is not accessible, due to permissions or data protection when the device is locked.
                     * The device is out of space.
                     * The store could not be migrated to the current model version.
                     Check the error message to determine what the actual problem was.
                    */
                    NSLog(@"Unresolved error %@, %@", error, error.userInfo);
                    abort();
                }
            }];
        }
    }
    
    return _persistentContainer;
}

#pragma mark - Core Data Saving support

- (void)saveContext {
    NSManagedObjectContext *context = self.persistentContainer.viewContext;
    NSError *error = nil;
    if ([context hasChanges] && ![context save:&error]) {
        // Replace this implementation with code to handle the error appropriately.
        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
        NSLog(@"Unresolved error %@, %@", error, error.userInfo);
        abort();
    }
}

@end
